39 results about "Coal gasifier" patented technology

The invention relates to the technical field of catalyst sulfuration in a coal gasification process, and particularly discloses a method for sulfuration of a shift catalyst by adding sulfur into low-sulfur coal, and the method comprises the following steps: fully mixing byproduct sulfur with boiler slag by adopting an internal mixing process to prepare a slag-sulfur mixture; fully and uniformly mixing the slag-sulfur mixture with low-sulfur coal, and feeding the mixture into a coal mill for milling to obtain pulverized coal; the method comprises the following steps: in a coal gasifier, carrying out online vulcanization on a shift catalyst by using pulverized coal, setting slag sampling once every half an hour after adding a slag-sulfur mixture, and monitoring the H2S concentration, the ash water pH value and the sulfate radical concentration in the synthesis gas in real time. According to the method, the by-product sulfur and the boiler slag are subjected to banburying compounding to prepare the slag-sulfur mixture, the slag-sulfur mixture and the low-sulfur coal are uniformly mixed in proportion to prepare powder, and by controlling the outlet temperature of the coal mill, the circulating air volume and the pressurized conveying temperature, the stable combustion of the coal powder and the on-line vulcanization of the shift catalyst are realized.

The invention relates to the technical field of concrete, and discloses a method for preparing coal gasification furnace slag concrete, which comprises the following steps of: mixing mixed fine aggregate of pebbles, sand and coal gasification furnace slag, a binding material, a composite exciting agent and water according to the total mass of 100 parts of the mixed fine aggregate of the pebbles, the sand and the coal gasification furnace slag, the binding material, the composite exciting agent and the water, and uniformly mixing the mixed fine aggregate of the pebbles, the sand and the coal gasification furnace slag, the binding material, the composite exciting agent and the water, the usage amounts of the mixed fine aggregate of the stones, the sand and the coal gasification furnace slag, the cementing material, the composite exciting agent and the water are respectively 40-45 parts, 24-40 parts, 15-22 parts, 1-5 parts and 5-10 parts, the mass of the coal gasification furnace slag is 35-65% of the mass of the mixed fine aggregate of the sand and the coal gasification furnace slag, and the composite exciting agent comprises a CaO-based early strength agent, phosphogypsum, a lithium salt and an alkali solution. The compact degree of a concrete matrix is greatly improved, so that the mechanical property and the durability index of the concrete are effectively improved, and particularly, the compressive strength and the chloride ion penetration resistance are remarkably improved.

The invention relates to the technical field of coal chemical industry, in particular to a method for evaluating the slag quantity of a dry pulverized coal gasifier in real time, which comprises the following steps: arranging a thermometer in a slag pool of the dry pulverized coal gasifier, arranging a thermometer and a flowmeter behind a quenching water heat exchanger, and arranging a regulating valve on a cooling water outlet pipeline of the quenching water heat exchanger; adjusting the outlet flow Q of the slag water circulating pump to be a constant value according to the reading of the flowmeter; the temperature t of the quenching water after the quenching water heat exchanger is controlled to be a constant value by using a regulating valve and a temperature controller of a cooling water outlet pipeline; based on the principle that the specific heat capacity of quenching water and molten slag and the temperature of the molten slag before quenching are constant, the real-time slag production amount of the gasifier is calculated through a preset formula, the method for evaluating the slag production amount of the dry pulverized coal gasifier in real time can evaluate the slag production amount of the dry pulverized coal gasifier in real time, guide personnel to carry out as-fired coal operation adjustment, and improve the slag production amount of the dry pulverized coal gasifier. Frequent fluctuation of the slag yield of the gasifier is avoided, and safe and stable operation of the burner cover and the slag conveyor is ensured.

According to the energy-saving device and method for graded pressure charging and releasing of the coal feeding device of the coal gasifier, the control system is used for coordinating the two coal feeding systems to alternately execute coal feeding, pressure charging, discharging and pressure releasing operations. And during coaling, opening the coal lock upper valve of the coal lock of the corresponding coaling system, and enabling the coal in the coal bunker to fall into the coal lock through the coaling chute until the set coaling quantity is reached. During pressurizing, the control system sequentially opens the pressurizing valves in the pressurizing branches according to the pressure grade from low to high, and the coal lock gas in the coal lock gas buffer pipe is used for pressurizing the coal lock. And during discharging, a coal lock lower valve of the coal lock is opened, and coal enters the gasification furnace from the transition bin. During pressure relief, according to the same principle, the control system sequentially opens the pressure relief valves in the pressure relief branches from the high pressure level to the low pressure level until pressure relief is completed. Through the graded pressure charging and discharging design, graded collection is performed according to pressure grades during pressure discharging, and meanwhile, the system is recycled as a pressure charging gas source, so that the system is more efficient, energy-saving and environment-friendly, the configuration scale of the coal lock gas compressor can be effectively reduced, and the energy consumption loss is reduced.

The utility model discloses coal gasification furnace slag granulating equipment, coal gasification furnace slag granulating equipment includes the material conveying mechanism, material modification mechanism, material binding mechanism, material granulating mechanism and material drying mechanism that connect gradually, and material modification mechanism includes acid -base adjusting subassembly and modification subassembly. The utility model discloses the application of coal gasification furnace slag granulating equipment system, and the preparation time of granular adsorbing material is shortened significantly, saves manpower and space cost, and improves the granulating efficiency.

The utility model discloses a large lignite gasifier with high productivity and convenience in operation. The large lignite gasifier comprises a gasifier main body and a deslagging device arranged below the gasifier main body, the gasification furnace body comprises a furnace shell, a furnace pipe, a water jacket, a conical combustion chamber located on the lower portion of the furnace pipe, a coal gas outlet pipe located on the upper portion of the furnace pipe, an observation opening formed in the furnace shell and extending to the furnace pipe, a coal feeding opening formed in the top face of the furnace pipe, an annular air supply chamber located on the lower portion of the furnace shell, a first draught fan and an air supply pipe communicating the annular air supply chamber with the combustion chamber. More than two groups of observation ports with openable door plates are arranged at intervals along the height of the furnace pipe, and 3-4 observation ports are arranged at intervals around the furnace shell in each group; an enhanced blast pipe is arranged at the bottom of the conical combustion chamber and is externally connected with a second fan; the deslagging device comprises a box body, a fixed plate and a rotating plate, wherein the fixed plate and the rotating plate are arranged at the top of the box body; and a slope plate is arranged in the box body. According to the utility model, the gas output can be increased, the quality and efficiency of the produced gas can be ensured, the operation is easy, and the labor is saved.

The utility model relates to coal gas generating equipment technical field discloses a coal storage device of pulverized coal gasification furnace, including coal storage hopper, the rear surface lower extreme of coal storage hopper is provided with opening and closing mechanism, and the front surface and inside of coal storage hopper are provided with anti -blocking mechanism jointly, the utility model discloses a anti -blocking mechanism is provided with, and anti -blocking mechanism effectively solved the jam problem that the coal powder leads to electrostatic force adsorption, water content agglomeration, particle bridging or inner wall adhesion, the stirring vane can dynamically break up the coal body of group coal and scatter the mechanical interlock between particles, and the scraper assembly continuously scrapes the wall adhesive layer of bin through the elastic compensation mechanism, and the flow line type material guiding design of three -segment type coal storage structure is combined, and the coal powder flow resistance is reduced significantly, the device activates the function of breaking down in the process of opening and closing linkage simultaneously, avoids the intermittent operation defect of traditional pneumatic arch breaking, can prevent the metamorphic, gas channeling and local cavity risk caused by coal powder retention, improves the continuity and reliability of the coal feeding system as a whole.

The invention belongs to the technical field of mine roadway support, and particularly relates to a mining flexible thin-layer two-component spraying material and a preparation method thereof. The mining flexible thin-layer two-component spraying material comprises a material A and a material B, the material A comprises an EVA emulsion and a coalescing agent; the material B comprises the following components in parts by weight: 20-40 parts of melamine modified urea resin powder, 5-10 parts of a curing agent, 40-70 parts of coal gasification furnace slag, 3-7 parts of expanded graphite, 3-5 parts of alpha-zirconium phosphate, 1-2 parts of a coupling agent and 0.05-0.3 part of fibers. The mining flexible thin-layer spraying material is small in rebound rate, good in adhesion and beneficial to inhibition of crack propagation.

The invention relates to the field of coal-fired boilers, in particular to an ultralow-load stable-combustion pre-gasification coupling combustion system which comprises a boiler furnace, each combustion layer of the boiler furnace is provided with a direct-current combustor and a pre-gasification combustor, the direct-current combustors are arranged at the four corners of the boiler furnace, and the pre-gasification combustors are arranged at the four corners of the boiler furnace. The pre-gasification combustors are arranged on four walls of a boiler furnace, and flames jetted by the pre-gasification combustors and flames jetted by the direct-current combustors are intersected and coupled in the center of the boiler furnace; and the pulverized coal gasification furnace is used for providing gasification products for the pre-gasification combustor, and the gasification products comprise gasification gas. The problems that in the prior art, safety is poor, consumption is large, and stable combustion cannot be achieved are solved.

The application provides a dry pulverized coal gasifier multi-pulverized coal line conveying automatic control method and device, which comprises the following steps: receiving various constraint conditions input on a DCS operation interface; collecting operation data of each coal preparation line and operation data of each gasifier; determining to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying according to the constraint conditions, the operation data of each coal preparation line and the operation data of each gasifier; if the single coal preparation line is started for pulverized coal conveying, a pre-set single coal preparation line conveying strategy is executed; if two or more coal preparation lines are started for pulverized coal conveying, a pre-set two or more coal preparation line conveying strategy is executed. Thus, the self-identification and selection of the coal preparation line can be realized, the pulverized coal conveying to the gasifier is fully automatically controlled, the human intervention is reduced, the timeliness and accuracy of the human judgment are avoided, and the safety of the pulverized coal conveying is significantly improved.

The utility model provides a gasification furnace waste residue unburned carbon gravity separation system, which can realize primary separation, particle size grading, gravity grading and dehydration treatment on waste residue slurry, efficiently and precisely separate unburned carbon in gasification furnace waste residues, and further perform resource utilization. Comprising a slurrying system, the upstream of the slurrying system is communicated with a coal gasifier waste residue storage system, and the slurrying system is used for dispersing coal gasifier waste residues in water to form uniform slurry; the grading system is communicated with the downstream of the pulping system and is used for sequentially carrying out primary separation and particle size grading on the pulp conveyed by the pulping system; the separation system is communicated with the downstream of the grading system, is provided with a multi-stage separation mechanism and is used for receiving the small-particle slurry conveyed by the grading system and carrying out multi-stage gravity grading on the slurry; and the grading dehydration system is communicated with the downstream of the separation system, is provided with a multi-stage dehydration mechanism, and is used for receiving the light particle slurry conveyed by the separation system and dehydrating the light particle slurry.

The embodiment of the invention provides an online diagnosis method and system for coal as fired abnormity of a coal gasifier, and the online diagnosis method comprises the steps: carrying out the space-time alignment of collected technological parameters, and obtaining the preprocessed technological parameters; real-time calculation is carried out based on sliding window correlation, and correlation coefficients among the preprocessed process parameters are established; if the correlation coefficient is greater than a reference threshold value, triggering an alarm; features in the diagnosis window are extracted based on the two-channel features, the anomaly types are determined, and the anomaly types comprise instrument anomaly, uneven coal mixing and unknown anomaly.

The application discloses a device and method for treating salt-containing wastewater by down-flow and concurrent-flow coal gasification heat recovery coordination, which comprises a coal gasification furnace, a synthetic gas cooler, a cyclone separator, a material return, a particulate controller, a raw material burner, a salt-containing wastewater feeding device, a lined pipeline and the like. Oxygen is injected into the generated crude synthetic gas through an oxygen nozzle at the connection between the coal gasification furnace and the lined pipeline, so that the carbon-containing material in the crude synthetic gas is combusted with the oxygen, the crude synthetic gas is secondarily heated, and the molten fly ash is not directly contacted with the quenching water. Solid particles are used as heat transfer media, and the specific surface area of the solid particles is extremely large, so that the overall heat transfer coefficient is more than 5 times of that of a traditional radiant waste heat boiler. The recovery of the sensible heat of the crude synthetic gas can be used to treat the salt-containing wastewater and produce glass bodies. The cooling and purification process of the crude synthetic gas is completely realized by a dry process, and no water-containing fine slag is generated.

The invention discloses a gasification furnace slag-based molecular sieve / nanocarbon composite material, a preparation method and application, the preparation method comprises the following steps: by taking coal gasification furnace slag and an alkaline activator as raw materials, mixing the coal gasification furnace slag with the solid alkaline activator, adding deionized water, adjusting the pH value, and stirring uniformly; a hydrothermal synthesis method is adopted for one-step in-situ synthesis of the gasification furnace slag-based molecular sieve / nanocarbon composite material. The invention further discloses the gasification furnace slag-based molecular sieve / nanocarbon composite material and application of the gasification furnace slag-based molecular sieve / nanocarbon composite material. According to the invention, all components in the coal gasification furnace slag are utilized, and the hierarchical pore gasification furnace slag-based molecular sieve / nanocarbon composite material which takes mesopores as a main component and has macropores and micropores is provided, so that the technical problems of how to realize all-component utilization of the gasification furnace slag and diversification of pore structures are solved.

The utility model discloses a kind of coal gasification furnace heat recycling devices, belong to coal gasification furnace field, including furnace body, the upper surface of the furnace body is equipped with filter frame, the inside of the filter frame is equipped with filter plate, the outer surface of the filter frame is equipped with cleaning assembly, the outer surface of the furnace body is equipped with recovery assembly, the upper surface of the recovery assembly is equipped with pump, the input end of the pump is communicated with the outer surface of filter frame by suction pipe, the cleaning assembly includes top frame and air pump. By being equipped with filter frame and filter plate in front of recovery assembly, the gas needed to be pumped into water storage tank can be filtered, coal dust in the gas is filtered out, so that coal dust is prevented from flowing out with gas and adhering to the inner wall of pipeline, so the device effectively solves the problem that existing device is prone to cause coal dust to adhere to the inner wall of connecting pipe during use, causing the efficiency of heat exchange to be affected.

The present application relates to coal gasification equipment technical field, specifically, relate to coal gasification furnace quenching ring tangential water inlet and outlet strengthened cooling device. The coal gasification furnace quenching ring tangential water inlet and outlet strengthened cooling device, it includes: the descending cylinder;Annular plate, the annular plate fixedly installed at the top outside of descending cylinder;Water chamber inner cylinder, the water chamber inner cylinder fixedly installed at the top inside of descending cylinder. In the application, two-stage tangential water inlet is arranged to make cooling water high-speed rotation, eliminate flow dead zone, and water curtain is continuously uninterrupted and uniform in thickness through spiral line-shaped water injection seam, complete water film is formed on the inner wall of descending cylinder, cooling uniformity and heat protection effect are improved, fine ash particles are thrown to the outer wall and deposited by using high-speed rotation centrifugal force and cooperating with triangular flow guide wedge, so that the continuous operation cycle is prolonged, periodic discharge is realized by cooperating with the blowdown pipe, in addition, the adhesion is enhanced by tangential water curtain injection, the synthesized gas is prevented from being blown away, and the operation reliability and safety of the gasification furnace are significantly improved.

The invention discloses a coal gasification system for coupling steam extraction of a steam turbine of a thermal power plant with high-temperature flue gas. The coal gasification system for coupling steam extraction of the steam turbine of the thermal power plant with the high-temperature flue gas comprises a coal-fired boiler, the steam turbine, a coal gasifier and a power station coal storage system. The steam turbine is communicated with the coal-fired boiler and comprises an intermediate-pressure cylinder, a steam inlet of the intermediate-pressure cylinder is communicated with the coal-fired boiler, the coal gasifier is used for coal gasification reaction and provided with a first inlet, a second inlet and a first outlet, and the first inlet is communicated with a steam outlet of the intermediate-pressure cylinder. The power station coal storage system is communicated with the coal-fired boiler and the second inlet of the coal gasifier and used for storing raw materials supplied to the coal-fired boiler for combustion and supplied to the coal gasifier for reaction. According to the coal gasification system for coupling steam extraction of the thermal power plant steam turbine with the high-temperature flue gas, an independent steam generation device and an independent raw material storage facility can be omitted, the energy utilization rate can be increased, the cost is effectively reduced, and the peak regulation capacity of the coal gasification system is improved.

The application discloses a processing method of a slag discharge port of a pulverized coal gasifier and a blocking prevention structure thereof, and comprises the following steps: step A, cutting the inner wall of the slag discharge port through a cutting machine; step B, welding a nickel-based steel plate smaller than the cutting object on the inner wall of the slag discharge port to form a sealing layer of the inner wall of the slag discharge port, so that the inner diameter of the slag discharge port is expanded to 1100mm-1200mm; and step C, polishing the surface of the nickel-based steel plate to keep smooth; the inner diameter of the slag discharge port is expanded by cutting the inner wall of the slag discharge port, so that the risk of slag blocking during the slag discharge of the gasifier is avoided, and the stable operation of the gasifier is ensured; the device can be automatically dredged by being provided with a mounting ring block, a first protruding block, a dredging assembly, a transmission assembly and a driving assembly, so that the good slag discharge effect is ensured, the structure is simple, the operation is stable, and the labor cost is reduced.

The invention belongs to the technical field of chemical equipment, and relates to a pure oxygen diesel starting burner applied to a pulverized coal gasifier, which comprises an igniter, an inner burner and an outer burner which are coaxially arranged from inside to outside, the outer burner comprises a third sleeve, a fourth sleeve and a fifth sleeve which are coaxially arranged from inside to outside, a water inlet channel is formed by a gap between the third sleeve and the fourth sleeve, and a water outlet channel is formed by a gap between the fourth sleeve and the fifth sleeve; the inner burner comprises a spray head, a first through hole is formed in the center of the spray head, a plurality of second through holes are evenly distributed in the periphery of the gas outlet end of the spray head, a plurality of third through holes are evenly distributed in the end face of the gas outlet end of the spray head, and the igniter is located in the first through hole. Compared with the prior art, the partial premixing type structural design is adopted, diesel oil and pure oxygen are partially mixed on the inner side of the burner head and then sprayed out, and the ignition success rate of the burner can be effectively increased.

The utility model provides a pulverized coal gasification furnace, and belongs to the technical field of gasification furnaces. The pulverized coal gasification furnace comprises a connecting assembly and a scattering assembly, a motor is arranged on one side of a stock bin, a scattering rod is rotationally connected with the stock bin and fixedly connected with the output end of the motor, the scattering rod and a scraper blade are driven by the motor to rotate, the scattering rod can scatter blocky pulverized coal, the blocky pulverized coal can be effectively scattered, and the problem of pulverized coal caking is solved; according to the invention, pulverized coal can uniformly enter the gasification furnace, the gasification efficiency is improved, the rotation of the scraper blade can scrape the pulverized coal on the sieve plate, and the cleaning function of the scraper blade can reduce the residue of the pulverized coal, reduce the risk of equipment blockage and reduce the frequency of shutdown maintenance; and a clamping connection mode is adopted, so that the sieve plate is conveniently disassembled and cleaned, blocky pulverized coal is conveniently scattered, the phenomenon that the sieve plate is blocked by pulverized coal piles is prevented, meanwhile, the sieve plate is conveniently disassembled and cleaned, and the practicability is reduced.

This invention relates to the field of building material preparation technology, and discloses a concrete admixture, its preparation method, and its application. The method includes the following steps: (1) drying, crushing, and screening coal gasification slag to obtain pretreated coal gasification slag; (2) ball milling and screening the pretreated coal gasification slag to obtain coal gasification slag micro powder with a specific surface area of ​​280-320 m² / kg and a particle size of 3-50 μm; (3) mixing the coal gasification slag micro powder, fly ash, and mineral powder at a weight ratio of 100:(10-80):(5-80). This method, by crushing and screening the coal gasification slag, combined with activation technology, and synergistically optimizing the particle size distribution, and then compounding it with other admixtures, obtains a compound coal gasification slag micro powder admixture for preparing high-performance concrete, which achieves precise control of concrete workability while meeting application and environmental requirements.

The invention relates to the technical field of pulverized coal distributors, in particular to a spiral-flow type pulverized coal distributor for a pulverized coal gasifier, which comprises a shell, and a plurality of pulverized coal output pipes are equidistantly distributed below the side wall of the shell along the circumferential direction of the shell; a cyclone guide pipe is arranged above the side wall of the shell, and a plurality of connecting pipes are arranged on one side, close to the shell, of the cyclone guide pipe; a pulse mechanism is arranged at the top of the shell, and an air pressure adjusting mechanism is arranged at the upper end of the pulse mechanism; through cooperation of the pulse mechanism and the pulse adjusting structure, when the air pressure in the shell is high, redundant air enters the barrel through the pipe body, when the driving assembly works, the piston is pushed to descend, in the process, air in the lower air chamber of the barrel enters the upper air chamber of the barrel through the one-way valve, and therefore storage of the redundant air is achieved; when the air pressure in the shell is low, the high-pressure air in the upper air chamber flows back into the shell, the rotational flow effect of the carrier gas and the pulverized coal in the shell is guaranteed, and the distribution effect is further guaranteed.

The utility model discloses a plugging brick for a preheating port of a coal gasifier vault, which comprises a castable cylinder, a cone and internal parts thereof. The lower part of the cylinder is provided with a plane seal and an arc-shaped surface seal, and the conical surface is provided with two conical seals. The internal part can enhance the anti-drawing force of the furnace brick and prevent the plugging brick from being broken from the middle part; the arc-shaped sealing contact area is large, the blocking brick can be better locked, a small gap is reserved in the front end conical surface, disassembly is convenient, the rear end conical surface is closely attached to the vault, and the situation that the vault position is subjected to blow-by and overtemperature, and vault bricks are damaged is effectively prevented. The plugging brick which is low in cost, high in strength, resistant to drawing and multiple in sealing is applied to vault plugging of a multi-nozzle gasification furnace, and is convenient to mount and dismount and good in sealing effect.

The application discloses a two-stage coal gas generator and a coal gasification method, and relates to the technical field of coal gasification, and particularly relates to a two-stage coal gas generator and a coal gasification method. The coal gas generator comprises a coal gas generator, which is provided with a feeding opening, an upper-stage coal gas outlet, a lower-stage coal gas outlet, a second gasification agent inlet and a first gasification agent inlet; a grate is arranged in the coal gas generator and located below the second gasification agent inlet; and a phenol water stripping tower is provided with a phenol water steam outlet of the phenol water stripping tower, which is in communication with the first gasification agent inlet and the second gasification agent inlet. The heat of the lower-stage coal gas is used for heating phenol water in a reboiler and superheating water vapor in a superheater, respectively. In the meanwhile, the sensible heat of the lower-stage coal gas is recovered, the temperature of the lower-stage coal gas is reduced, the thermal efficiency is high, the phenol water obtained after purification treatment of the upper-stage coal gas is recycled and utilized, and the resource utilization rate is improved.

The invention belongs to the field of industrial automation, and discloses a gasifier production parameter closed-loop control method and system based on slag identification, and the method comprises the steps: building a slag image collection system, and carrying out the intelligent model selection based on the parameters of slag discharge equipment; establishing a deslagging time analysis model, and identifying an effective sampling time period through current abrupt change; constructing a multi-branch convolutional neural network model, extracting and analyzing features of a straight line, a small circle and a large circle, accurately identifying a furnace slag form, and mapping the furnace slag form into a furnace temperature state grade; and performing closed-loop regulation on production parameters of the coal gasifier according to analysis results. According to the invention, online, real-time and non-contact intelligent detection and closed-loop control of the slag state are realized, the problems of lagging and strong subjectivity of traditional manual detection are solved, and the process stability, the resource utilization rate and the automation level are remarkably improved.

The invention relates to the technical field of corrosion inhibitors, in particular to an imidazoline corrosion inhibition compound as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking octadecanoic acid and aminoethyl ethanolamine as raw materials and calcium oxide as an alkaline carrier, mixing octadecanoic acid, aminoethyl ethanolamine and calcium oxide, and under the catalytic action of calcium oxide, sequentially carrying out amidation reaction and nucleophilic substitution-cyclization reaction by utilizing electromagnetic wave dielectric heating to form an imidazoline ring structure, the imidazoline corrosion inhibition compound is obtained. According to the preparation method, the problem of side reaction caused by uneven thermal gradient and local overheating in the traditional process is solved through an innovative electromagnetic wave dielectric heating technology, and the use of an organic solvent is avoided through a solvent-free synthesis process, so that efficient, environment-friendly and energy-saving preparation of the imidazoline corrosion inhibitor is realized; and a sustainable industrial solution is provided for corrosion protection of carbon steel in the water environment of the coal gasifier.

This invention discloses a dry pulverized coal gasifier, comprising an upper furnace body, a fire-tube boiler, a lower furnace body, and a circular end cap, connected sequentially from top to bottom. Advantages: The lower furnace body has a first coal feeding port, a second coal feeding port, and a third coal feeding port arranged sequentially from bottom to top, allowing pulverized coal to be added at different heights within the lower furnace body. Furthermore, the lower furnace body has an overall inverted conical design, with its cross-sectional area increasing from bottom to top. This allows for variations in the gas velocity in the fluidized bed; a smaller cross-sectional area results in a higher gas velocity, ensuring a high gas velocity at the bottom of the fluidized bed and achieving optimal fluidization, thus preventing slagging at the bottom of the gasifier. Additionally, the coordination of the air supply pipe and water spray pipe effectively reduces the bed temperature. Combined with the inverted conical design of the lower furnace body, this lowers the pressure and temperature near the central jet pipe while increasing the gas velocity in that area, further preventing slagging at the bottom of the gasifier.

The invention belongs to the technical field of heavy raw material gasification, and particularly relates to a coal gasification slag graded utilization system and process, which comprises a gasification furnace unit, a first vibrating screen, a stirring tank, a gravity separator, a mixing tank, a second vibrating screen, a dewatering and drying device and a sedimentation basin, the bottom of the gasification furnace unit is connected with an inlet of a vibrating screen I; an undersize material outlet of the vibrating screen I is connected with an inlet of a stirring tank; an outlet of the stirring tank is connected with an inlet of a gravity separator; a small-specific-gravity material outlet of the gravity separator is connected with an inlet of a mixing tank; an undersize product outlet of the second vibrating screen is connected with an inlet of the sedimentation tank, and an oversize product outlet of the second vibrating screen is connected with the dewatering and drying equipment. Carbon and ash in the coal gasification slag are separated, the unburned carbon content is increased, meanwhile, the ash content is reduced, the calorific value of the gasification slag is increased, and the purpose that the gasification slag serves as a boiler blending combustion raw material or a boiler raw material is achieved.

The invention discloses a pulverized coal gas self-adaptive separation and collaborative conversion in-situ power generation device and method, and relates to the technical field of coal mine gas prevention and utilization. Comprising a shell, an inertia grading separation mechanism, a centrifugal separation mechanism, a pulverized coal gasifier, a methane reformer and a solid oxide fuel cell, the inertia grading separation mechanism is communicated with a gas inlet of the shell, a plurality of parallel inertia separation channels are arranged to enable pulverized coal-containing gas mixed gas to form a flow velocity gradient, and the centrifugal separation mechanism is arranged at the downstream of the inertia grading separation mechanism and is communicated with the pulverized coal gasifier. The pulverized coal gasifier is communicated with a pulverized coal outlet of the centrifugal separation mechanism, and the methane reformer is communicated with a methane outlet of the centrifugal separation mechanism. The anode of the solid oxide fuel cell is communicated with the synthesis gas outlets of the pulverized coal gasifier and the methane reformer, and the synthesis gas is utilized to generate electric energy so as to realize in-situ power generation in the coal seam drill hole, so that the separation efficiency of coal mine gas and pulverized coal is improved, and the energy utilization rate and the system operation stability are improved.

The invention discloses a boiling gasification device, and belongs to the technical field of mineral separation. The device comprises a coal gasifier and a tempering furnace, the top of the coal gasifier is covered with a furnace top, and the upper part of the coal gasifier is connected with the top of the tempering furnace through a pipeline; a barrel is arranged at the upper part in the hardening and tempering furnace and is suspended in the hardening and tempering furnace; the furnace top and the cylinder body are made of heat-resistant steel; a plurality of Y-shaped anchoring parts are evenly arranged on the inner side of the furnace top, and a heat insulation layer and a heat-resisting pouring layer are sequentially arranged on the inner side of the furnace top from outside to inside. The head of the Y-shaped anchoring part is located in the heat-resisting pouring layer, the thickness of the heat-insulating layer ranges from 40 mm to 60 mm, and the thickness of the heat-resisting pouring layer ranges from 120 mm to 180 mm. A tortoise-shell tile layer and a heat-resistant ceramic layer are sequentially arranged on the inner side of the cylinder body from outside to inside, the thickness of the cylinder body is 5-8 mm, the tortoise-shell tile layer is made of heat-resistant steel, the thickness of the tortoise-shell tile layer is 20-25 mm, and the thickness of the heat-resistant ceramic layer is 28-35 mm. And the service cycles of the furnace top and the cylinder can be prolonged.